I received a 5.1-channel file, but Foobar2000 shows an unusually long duration.
The M4A file duration also looks abnormal:
[STREAM]
index=0
codec_name=eac3
codec_long_name=ATSC A/52B (AC-3, E-AC-3)
codec_type=audio
codec_time_base=1/48000
codec_tag_string=ec-3
codec_tag=0x332d6365
sample_fmt=fltp
sample_rate=48000
channels=6
channel_layout=5.1(side)
start_time=0.000000
duration_ts=8626646
duration=179.721792 <- Real Play Time
[STREAM]
index=1
codec_name=mjpeg
codec_long_name=Motion JPEG
profile=Baseline
codec_type=video
codec_time_base=0/1
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
start_time=0.000000
duration_ts=104942321
duration=1166.025789 <- Wrong Play Time
[/STREAM]
[FORMAT]
filename=01. METRONOME - izna.m4a
nb_streams=2
nb_programs=0
format_name=mov,mp4,m4a,3gp,3g2,mj2
format_long_name=QuickTime / MOV
start_time=0.000000
duration=1166.025792 <- Wrong Play Time
size=18770620
bit_rate=128783
probe_score=100
TAG:major_brand=M4A
TAG:minor_version=1
TAG:compatible_brands=isomiso5hlsfcmfccceaM4A mp42
TAG:creation_time=2026-06-04T05:24:15.000000Z
TAG:track=1/5
TAG:date=2026.06.08
TAG:title=METRONOME
TAG:artist=izna
TAG:album_artist=izna
TAG:album=SET THE TEMPO
[/FORMAT]
This makes me wonder whether there is something wrong with the wrapper
I received a 5.1-channel file, but Foobar2000 shows an unusually long duration.
The M4A file duration also looks abnormal:
[STREAM]
index=0
codec_name=eac3
codec_long_name=ATSC A/52B (AC-3, E-AC-3)
codec_type=audio
codec_time_base=1/48000
codec_tag_string=ec-3
codec_tag=0x332d6365
sample_fmt=fltp
sample_rate=48000
channels=6
channel_layout=5.1(side)
start_time=0.000000
duration_ts=8626646
duration=179.721792 <- Real Play Time
[STREAM]
index=1
codec_name=mjpeg
codec_long_name=Motion JPEG
profile=Baseline
codec_type=video
codec_time_base=0/1
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
start_time=0.000000
duration_ts=104942321
duration=1166.025789 <- Wrong Play Time
[/STREAM]
[FORMAT]
filename=01. METRONOME - izna.m4a
nb_streams=2
nb_programs=0
format_name=mov,mp4,m4a,3gp,3g2,mj2
format_long_name=QuickTime / MOV
start_time=0.000000
duration=1166.025792 <- Wrong Play Time
size=18770620
bit_rate=128783
probe_score=100
TAG:major_brand=M4A
TAG:minor_version=1
TAG:compatible_brands=isomiso5hlsfcmfccceaM4A mp42
TAG:creation_time=2026-06-04T05:24:15.000000Z
TAG:track=1/5
TAG:date=2026.06.08
TAG:title=METRONOME
TAG:artist=izna
TAG:album_artist=izna
TAG:album=SET THE TEMPO
[/FORMAT]
This makes me wonder whether there is something wrong with the wrapper